Alternatively, if you're using one of the retro-fit drains that sits on TOP
of the liner instead of through it, it will be powered by a pump, so a 2"
drain can be used.

I use one of these drains, and it uses gravity feed to the filter, not
powered by the pump, and I've seen thru the liner one's powered by a pump.
So I'd say it's the designer, not the drain type that configures the
situation. ;o) ~ jan


~ jan (Do you know where your water quality is?)